Forgotten recovery mode password

Solution 1:

Try the following steps:

• Switch off your Mac (not just log out).

• Boot into Recovery mode by pressing the power button while holding down the CommandR keys.

• Select Disk Utility and press Continue.
• Choose Utilities > Terminal.

• Type resetpassword (all one word, lowercase letters) and press Return

• Select the drive containing your user account (this is usually your main drive)

• Choose the account to change with Select the User Account
• Enter a new password and re-enter it into the password fields
• Enter a new password hint related to the password
• Click Save. (Note: you may get a warning that the password has changed, but not the Keychain Password. Click OK.)
• Shut down your Mac (Apple > Shut Down)
• Restart your Mac